This paper proposes and validates a novel simulation for thermal non-destructive characterization. An electro-thermal modelling of the sample is adapted for MATLAB-SIMULINK simulation. Though the technique is capable of considering any heat stimuli on an arbitrary sample, the special case of lock-in thermography (LT) with periodic heating is taken up for illustration. A mild-steel sample having...

Within recent years there has been an increase in the use of NDT methods to detect defects and anomalies in various civil engineering structures. Infrared thermography, which has been successfully used in the USA in civil engineering applications, is being increasingly applied in the UK as an NDT technique. For example, the technique is now included in the Building Regulations for the assessmen...

Thermal barrier coatings (TBCs) are used in gas turbine engines to protect engine hot-section components in the harsh combustion environments, and extend component lifetimes. Infrared Thermography method has been selected for obtaining thermal images and studying the TBCs of Alumina, Zirconia and Alumina+Titanium oxide coated on the base plate of Titanium, by measuring the back wall temperature...

RATIONALE Varicella zoster virus is a neurotropic virus that causes an infectious disease characterized by skin changes and neuropathic pain. After the resolution of the first infection, the virus lies dormant within the sensory ganglia. The reactivation of the virus causes zoster. An alteration in skin infrared emission might be expected in the areas of the skin affected by inflammatory change...

Thermography (infrared imaging) is a non-invasive technique applied for the detection breast cancer. We consider the problem of automatically recognition malignant breast from frontal view thermography image presented as gray scale image. This framework provides insights into several issues: breast Region of Interest (ROI) detection, extraction statistical features, extraction features based on...

OBJECTIVE It was the aim of this study to investigate the surface temperature in newborns within the first hour after delivery. Furthermore, the influence of different environmental conditions with regard to surface temperature was documented. METHODS Body surface temperature was recorded under several environmental conditions by use of infrared thermography. 42 newborns, all delivered at ter...

− Lock-in and pulse phase infrared thermography measurement techniques have been exploited for quantitative assessment of subsurface defects in a reference specimen made of Plexiglas. Radiometric thermal images were post-processed using a contrast approach in the frequency domain, allowing defect depth location to be resolved with a relative combined standard uncertainty of about 7% for thickne...

Composite materials are often more practical in use for different military applications. These materials provide interesting results especially through their good strength properties, corrosion resistance and low specific weight. These materials have various structures. Any defect of these materials usually has a more complicated and other form than in metals and that is why methods and diagnos...